Spray gun



FIG. 1 is a top plan view of a spray gun showing our new design;

FIG. 2 is a front elevational view thereof, the rear view being a mirror image;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is an end elevational view thereof, on an enlarged scale; and,

FIG. 5 is an opposite end elevational view thereof, on an enlarged scale. 

The ornamental design for a spray gun, as shown and described. 